Box-pile



2 sneets-she't 1. R. H. LIBBY.

(No Model.)

BOX PILE.

Patented May-Z5, 1886.-

. 2 sheetsn 2' LIBBY 'BOX FILE.

(NO Mod Patented May 25, 1886.

INVENTEIR yMf/f MTNE5'S'5 i of my invention.

UNITED STATES PATENT OFFICE.

ROBERT H. LIBBY, OF BOSTON, MASSACHUSETTS.

BOX-PILE.

SPECIFICATION forming part of Letters Patent No. 342,447, dated May 25, 1886.

Application filed December 26, 1885.

To all whom, it may concern:

Be it known that I, ROBERT H. LIBBY, of Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in the Manufacture of Composite Metals, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates to that manufacture of composite metals which comprises the as sembling of the metals in the form of a boxpile, and their subsequent reduction to a composite integral form by heating and rolling; and it refers, especially, to the form or mode of making the box-pile.

I-Ieretoforc such piles have generally been made from boxes more or less elaborate, having flat metal ends secured thereto in an expensive way. By my invention the ends of the pile are made of slabs or plates piled one upon the other, and are united to the remainder of the box by straps which encircle the entire box, or in any other desired way.

Referring to the drawings, Figure 1 is a perspective of a box-pile having the features Fig. 2 is a longitudinal vertical section, and Fig. 3 is a cross-section thereof. Fig. 4 illustrates apile having holes or apertures formed therein at or near the ends thereof, for the purpose hereinafter stated.

a represents the bottom plate of the pile; a, one side plate, and a the other side plate; a, the top plate; a, one end, and a? the other end thereof. The ends are made up of metal slabs or pieces of plate a, placed or piled as shown, so that the box as a whole comprises the bottom, side, and top plates, and the pilev of slabs or plates forming the ends. The space within the box is filled with metal having any desired arrangement, according to the article to be produced. The exterior metal may be of iron or any material which will stand a welding heat and protect the interior metal during the heating process. The interior metal may be of steel, copper, or any other metal, or an alloy. The sides, top, and bottom,while represented as secured together by Serial No.18fi,702. N0 model.)

pile can readily escape in the subsequent rolling or reducing operation. In piles having a solid or substantially solid end, there is no way by which these gases can escape while the metal is being rolled or reduced, as in such reduction one end of the pile is first submitted to the action of the rolling or reducing mechanism, and if gases have been evolved during the heating, they are pressed or crowded forward from that end to the other end of the pile, and if there are no means provided for their escape they are very likely to burst open the end and cause aloss of metal and an imperfect product, while if passages are provided through which the gases can escape this result is avoided. By piling the ends these escape-passages are provided,as of course the ends cannot be piled so closely as to make a substantially solid or continuous end before rolling. This effect can also be obtained by punching or forming holes in the exter or of the casing of the pile near the ends, or in the end piece when a solid plate is used, but this is a more expensive operation, and while I consider that it involves this feature of my invention, I prefer the form of construction first named.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States-- 1. A metal pile comprising the bottom, side, and top plates, a a a (6, the ends a made of plates or slabs of metal piled one upon the other, as described, and an interior metal filling, all substantially as described.

2. The combination, in a metal pile, of the bottom, side, and top plates, (0 a a a the 4. A metal pile having holes, ducts, or passages arranged therein at or near the ends 10 thereof, substantially as described.

ROBERT H. LIBBY.

Vitnesses:

F. F. RAYMOND, 2d, FRED. B. DoLAN. 

